<div>
    检查从节点的可用性

    <dl>
        <dt><b>
            尽可能的保持这个节点在线
        </b></dt>
        <dd>
            这是默认正常的设置
            在这种模式下，hudson视图保持slave节点在线
            如果在没有用户的援助下hudson可以启动slave，当slave不可以使用的时候它将定期尝试检测启动而使得slave不掉线
        </dd>

        <!--dt><b>
            Take this slave on-line and off-line at specific times
        </b></dt>
        <dd>
            In this mode, Hudson will keep the slave on-line according to the configured schedule.
            If Hudson can start the slave without user assistance, it will periodically
            attempt to start the slave if it is unavailable during an on-line window.

            During an off-line window, the slave will only be taken off-line if there are no active
            jobs running on the slave.
        </dd-->

        <dt><b>
            Take this slave on-line when in demand and off-line when idle
        </b></dt>
        <dd>
            In this mode, if Hudson can launch the slave without user assistance, it will periodically
            attempt to launch the slave while there are unexecuted jobs which meet the following criteria:
            <ul>
                <li>They have been in the queue for at least the specified startup demand period</li>
                <li>They can execute on this slave</li>
            </ul>

            The slave will be taken off-line if:
            <ul>
                <li>There are no active jobs running on the slave</li>
                <li>The slave has been idle for at least the specified idle period</li>
            </ul>
        </dd>
    </dl>
</div>